Kemp, Murray C. A contribution to the general equilibrium theory of preferential trading / by Murray C. Kemp. - Amsterdam : North-Holland Pub. Co., c1969 - 147 p. : ill. ; 23 cm. - Contributions to economic analysis, 61 . Includes index. ISBN: 72043162X Subjects--Topical Terms: Commerce--Mathematical models.Tariff preferences. Dewey Class. No.: 380.0184 / KEC 1969